George h



G. H. BUZZELL.

(No Model.)

PIPE WRENCH.

No. 438,343. Patented 001;. 14, 1890.

UNITED STATES j PATENT FFICE- GEORGE H. BUZZELL, OF BOSTON,MASSACHUSETTS, ASSIGNOR OF ONE-HALF I TO OZRO C. CLARK, OF SAME PLACE.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Iatent No. 438,343, dated October14, 1890.

Application filed August 18,1890. Serial No. 362,275. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE H. BUZZELL, of Boston, in the county ofSuffolk, State of. Massachusetts, have invented certain 11 ew and usefulImprovements in Piperenches, of which the following is a descriptionsufficiently full, clear, and exact to enable any person skilled in theart or science to which said invention appertains to make use the same,reference being had to the accompanying drawings, forming part of thisspecification, in which- Figure 1 is a side elevation of my improvedpipe-wrench represented as in use; Fig. 2, a top plan view of the same,and Fig. 3 a longitudinal section taken on line a; w in Fig. 2.

Like letters of reference indicate corresponding parts in the diiferentfigures of the drawings.

My invention relates especially to that class of wrenches known aspipe-wrenches; and it consists in certain novel features hereinafterfully set forth and claimed, the object being to produce a simpler,cheaper, and more effective device of this character than is now inordinary use.

The nature and operation of the improvements will be readily understoodby all conversant with such matters from the following explanation.

'In the drawings, A represents the handle, which may be of any suitableform, and is provided in one end with a chamber b, said chamber openingat two sides and through the end of said handle. Aspreader cl extendslaterally across the mouth f of the chamber, said spreader beingwedge-shaped in crosssection. Each sidewall g of the chamber is providedwith a longitudinal slot h;

The jaws B O consist of two levers, which project into the chamber atopposite sides of the spreader, respectively, said levers being pivotedon a bolt 1', fitted to slide laterally in the slots h. A check-nut k isturned onto the bolt to secure it in position in the slots. The

edges of one slot may be indented or corrugated, as shown at m in Fig.1, the bolt-head p engaging said corrugations and preventing the boltfrom slipping in the slots when the wrench is in use. One jaw B istoothed-at z, the corresponding edge of the companionj aw beingpreferably smooth; but both jaws may be toothed, if desired.

In the use of my improvement the nut is is loosened and the bolt 1'moved in the slots h, projecting the jaws outward until they are spreadsufficiently to receive the pipe P, the spreaderd causing said jaws toseparate as they move outward. The nut is then turned onto the boltsufliciently to bind it securely in its slots and prevent the jaws frombeing accidentally forced inward. The wrench is operated to turn thepipe in the usual man ner, the toothed jaw preventing it from slippingthereon andcausing the pipe to bind firmly between the jaws as thewrench is moved. The distance between the spreader d and ends 1) of thechamber-mouth is slightly greater than the width of the jaws, admittingfree play thereto and enabling the jaws to be more readily adjusted onthe pipe. Wrenches as thus constructed are cheap and durable. The jawswhen Worn may be easily removed for sharpening or substituted forothers.

Having thus explained my invention, What I claim is 1. In a pipe-wrench,a handle chambered longitudinally at one end and provided with slots inthe walls thereof, in combination with two movable jaws mounted on apivot fitted to slide in said slots, substantially as set forth.

2. In a pipe-wrench, a handle provided with a chamber opening throughone end and having slots in its walls, in combination-with a pivotfitted to slide in said slots, two movable jaws mounted on said pivotand projecting from the mouth of said chamber, and mechanism forsecuring said pivot in said slots, substantially as described.

3. In a pipe-Wrench, a chambered body or handle, in combination with amovable pivot or bolt fitted to slide laterally in slots in thechamber-walls, a check-nut for said bolt, two jaws pivoted in said boltand projecting from said chamber, and a spreader for said jaws,substantially as set forth.

In a pipe-wrench, the body or handle A, pr vided with the chamber b,having the slots h roughened 01 corrugated at m, in c0n1binanut 70, thetoothed jaw B, and smooth jaw 0, tion with the pivot-bolt 2', thecheck-nut is pivoted on said bolt, all being arranged to 0pthereon, andthe jaws B O, pivoted on said erate substantially as set forth.

bolt, substantially as described. GEORGE H. BUZZELL.

5. In a pipe-wrench, the handle A, cham Witnesses: bered at b andprovided with the slots h and O. M. SHAW,

spreader d; incombination with the bolt 2' and N. TURNER.

